Troubleshooting Solar: Why Isn't My Solar System Producing Enough Energy?

Assessing System Sizing

When a solar system isn’t producing enough energy, it’s essential to assess the system’s sizing. This involves checking the total wattage of the solar array and comparing it to the energy requirements of the household or business. A general rule of thumb is to size the system for 20-25% of peak energy demand, with some experts suggesting up to 30%. For example, if a home uses 10,000 kWh of energy per year, a 2,000-2,500 watt solar array could be sufficient. However, this doesn’t account for energy storage, which can help offset energy deficits during periods of low sunlight.

Evaluating Shading and Array Orientation

Shading issues and poor array orientation can significantly impact solar energy production. For instance, a 5% reduction in solar array efficiency can result in a 10% decrease in energy production. To mitigate this, consider the solar sun hours by state and adjust the array’s orientation accordingly. In general, south-facing arrays tend to perform better in the northern hemisphere, while east- and west-facing arrays can be effective in areas with high morning and afternoon sunlight. Additionally, pruning trees and other vegetation can help minimize shading issues.

Monitoring and Adjusting

To troubleshoot a solar system not producing enough energy, it’s crucial to monitor its performance. This can involve tracking energy production, temperature, and voltage levels. By analyzing this data, you can identify any potential issues and make adjustments to optimize the system’s performance. For example, checking the system’s voltage levels can help determine if the inverter is functioning properly, while monitoring temperature levels can indicate if the system is overheating. By making these adjustments, you can help ensure your solar system is running efficiently and producing the energy you need.